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-rw-r--r--arch/arm/kernel/traps.c44
1 files changed, 29 insertions, 15 deletions
diff --git a/arch/arm/kernel/traps.c b/arch/arm/kernel/traps.c
index 79abc4ddc0cf..57eb0f6f6005 100644
--- a/arch/arm/kernel/traps.c
+++ b/arch/arm/kernel/traps.c
@@ -27,6 +27,7 @@
#include <asm/system.h>
#include <asm/unistd.h>
#include <asm/traps.h>
+#include <asm/unwind.h>
#include "ptrace.h"
#include "signal.h"
@@ -61,6 +62,7 @@ void dump_backtrace_entry(unsigned long where, unsigned long from, unsigned long
dump_mem("Exception stack", frame + 4, frame + 4 + sizeof(struct pt_regs));
}
+#ifndef CONFIG_ARM_UNWIND
/*
* Stack pointers should always be within the kernels view of
* physical memory. If it is not there, then we can't dump
@@ -74,6 +76,7 @@ static int verify_stack(unsigned long sp)
return 0;
}
+#endif
/*
* Dump out the contents of some memory nicely...
@@ -150,13 +153,33 @@ static void dump_instr(struct pt_regs *regs)
set_fs(fs);
}
+#ifdef CONFIG_ARM_UNWIND
+static inline void dump_backtrace(struct pt_regs *regs, struct task_struct *tsk)
+{
+ unwind_backtrace(regs, tsk);
+}
+#else
static void dump_backtrace(struct pt_regs *regs, struct task_struct *tsk)
{
- unsigned int fp;
+ unsigned int fp, mode;
int ok = 1;
printk("Backtrace: ");
- fp = regs->ARM_fp;
+
+ if (!tsk)
+ tsk = current;
+
+ if (regs) {
+ fp = regs->ARM_fp;
+ mode = processor_mode(regs);
+ } else if (tsk != current) {
+ fp = thread_saved_fp(tsk);
+ mode = 0x10;
+ } else {
+ asm("mov %0, fp" : "=r" (fp) : : "cc");
+ mode = 0x10;
+ }
+
if (!fp) {
printk("no frame pointer");
ok = 0;
@@ -168,29 +191,20 @@ static void dump_backtrace(struct pt_regs *regs, struct task_struct *tsk)
printk("\n");
if (ok)
- c_backtrace(fp, processor_mode(regs));
+ c_backtrace(fp, mode);
}
+#endif
void dump_stack(void)
{
- __backtrace();
+ dump_backtrace(NULL, NULL);
}
EXPORT_SYMBOL(dump_stack);
void show_stack(struct task_struct *tsk, unsigned long *sp)
{
- unsigned long fp;
-
- if (!tsk)
- tsk = current;
-
- if (tsk != current)
- fp = thread_saved_fp(tsk);
- else
- asm("mov %0, fp" : "=r" (fp) : : "cc");
-
- c_backtrace(fp, 0x10);
+ dump_backtrace(NULL, tsk);
barrier();
}